Results 221 to 230 of about 1,555,580 (293)

Multidimensional Aerothermodynamic Analysis for Planetary Probes Using OLAP Cubes

AIAA Atmospheric Flight Mechanics Conference and Exhibit, 2006
SPARTA is an Aerothermodynamic, two dimensional, Structured, Compressible, Navier-Stokes flow-solver which is platform independent, JAVA based and Graphical User Interface driven. A Trajectory framework has been developed to study the aerodynamic heating and to do preliminary trajectory analysis.
P. Subrahmanyam
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Dynamics of planetary probes - Design and testing issues

36th AIAA Aerospace Sciences Meeting and Exhibit, 1998
Interest in planetary probes has increased significantly in the last few years. Many of the proposed missions will use aeroassist for the capture and descent phases of the missions. This use of aeroassist will put a greater demand on having accurate aerodynamics for these vehicles.
Gary Chapman, Leslie Yates
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Basalts as Probes of Planetary Interior Redox State

Reviews in Mineralogy and Geochemistry, 2008
Whether the redox state, quantified as oxygen fugacity, recorded in a planetary basalt is an accurate representation of the redox state of the planetary interior from which it was derived through partial melting, ascent, eruption and emplacement is a fundamental question in planetary geology. In the absence of mantle xenoliths in samples from the Moon,
C. Herd
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Using planetary nebulae as abundance probes of galaxies

SPIE Proceedings, 2000
Imaging surveys of the bright 5007 angstrom line in nearby early-type galaxies and the bulges of spirals have catalogued many planetary nebulae. Planetary nebulae arise from the late stages of evolution of low mass stars and are thus representative of a large fraction of the stellar population by number.
Jeremy R. Walsh, George H. Jacoby, Reynier F. Petetier, Nicholas A. Walton   +3 more
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Limit cycle analysis of planetary probes

37th Aerospace Sciences Meeting and Exhibit, 1999
Gary Chapman, Leslie Yates
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Planetary atmospheric determination utilizing a semipassive probe.

Journal of Spacecraft and Rockets, 1965
A simple experiment has been conceived for providing highly accurate knowledge on the density/ and pres sur e/altitude profiles of planetary atmospheres, notably those of Mars and Venus. The experiment consists of a small, lightweight spherical probe injected into the planetary atmosphere either from a flyby spacecraft prior to planetary encounter or ...
FRANK HOLMAN, HAIM KENNET
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Probing Planetary Architectures with SPICE

Bulletin of the American Astronomical Society, 2023
Understanding the formation and evolution of planetary systems is a challenging area of study, requiring high spatial resolution and special techniques to observe planets in formation in protoplanetary disks and the resulting disk/planet systems that are created. These systems provide a point of comparison to our own Solar System, in which we know that
Matthews, Brenda, Pokorny, Petr, Crotts, Katie, Kennedy, Grant, Matra, Luca, Najita, Joan, Pawellek, Nicole, Su, Kate, Wyatt, Mark, Leisawitz, David   +9 more
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Bistatic radar probing of planetary surfaces

2009 IEEE Radar Conference, 2009
Bistatic radar provides a simple, cost-effective way to obtain survey information about planetary surfaces on scales important to landers and rovers. The centimeter-scale waves interact most strongly with surface structure on similar and slightly larger scales yielding estimates of rms surface slopes ζ and material dielectric constant e (which can be ...
Richard A. Simpson, G. Leonard Tyler, Bernd Hausler, Martin Patzold, Sami Asmar   +4 more
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PROBING PLANETARY ATMOSPHERES WITH STELLAR OCCULTATIONS

Annual Review of Earth and Planetary Sciences, 1996
▪ Abstract  Earth-based stellar occultations probe the temperature, pressure, and number-density profiles of planetary atmospheres in the microbar range with a vertical resolution of a few kilometers. Depending on the occultation data available for a given body and other information, the technique also allows determination of local density variations,
J. L. Elliot, C. B. Olkin
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Magnetic probing of planetary interiors

Physics of the Earth and Planetary Interiors, 1979
Abstract The following general question is addressed: what can be learned about a planetary interior from measurements of the global planetary magnetic field at (or near) its surface? The discussion is placed in the context of Earth, for clarity, but the considerations apply to terrestrial planets in general (so long as the observed magnetism is ...
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